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An Acromyrmex echinatior leafcutter worker displays a microbial white patch on her underside made of Actinomyces bacteria. The bacteria are thought to produce antibiotics protecting the ants' fungus garden from infection- a true example of pesticide use among agricultural insects. Panama; Laboratory colony at the University of Wisconsin at Madison
Acromyrmex echinatior leafcutter worker with Actinomyces bacteria on its chest. The bacteria are thought to produce antibiotics protecting the ants' fungus garden from infection. Panama; Laboratory colony at the University of Wisconsin at Madison
Inside the spongy galleries of the fungus garden, Acromyrmex echinatior leafcutter workers display microbial white patches on their chests made of Actinomyces bacteria. The bacteria are thought to produce antibiotics protecting the ants' fungus garden from infection- a true example of pesticide use among agricultural insects. Panama; Laboratory colony at the University of Wisconsin at Madison
An Acromyrmex echinatior leafcutter worker displays a microbial white patch on her underside made of Actinomyces bacteria. The bacteria are thought to produce antibiotics protecting the ants' fungus garden from infection- a true example of pesticide use among agricultural insects. Panama; Laboratory colony at the University of Wisconsin at Madison
An Atta cephalotes leafcutter ant navigates the fungus garden. Note how the garden is structured into chambers. Laboratory colony at the University of Wisconsin
Atta cephalotes leafcutter ants in the fungus garden. Laboratory colony at the University of Wisconsin
In a laboratory nest, Atta cephalotes leafcutter ants tend to their fungus garden. University of Wisconsin at Madison
In a laboratory nest, Atta cephalotes leafcutter ants tend to their fungus garden. University of Wisconsin at Madison
Trachymyrmex desertorum workers in the fungus garden. Tucson, Arizona, USA
An Acromyrmex echinatior leafcutter worker displays a microbial white patch on her underside made of Actinomyces bacteria. The bacteria are thought to produce antibiotics protecting the ants' fungus garden from infection- a true example of pesticide use among agricultural insects.

Panama; Laboratory colony at the University of Wisconsin at Madison
An Acromyrmex echinatior leafcutter worker displays a microbial white patch on her underside made of Actinomyces bacteria. The bacteria are thought to produce antibiotics protecting the ants' fungus garden from infection- a true example of pesticide use among agricultural insects. Panama; Laboratory colony at the University of Wisconsin at Madison
An Acromyrmex echinatior leafcutter worker displays a microbial white patch on her underside made of Actinomyces bacteria. The bacteria are thought to produce antibiotics protecting the ants' fungus garden from infection- a true example of pesticide use among agricultural insects.

Panama; Laboratory colony at the University of Wisconsin at Madison
See photo in original gallery.
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all images and text © Alex Wild 2001-2013